In the steady state, cardiac output equals. venous return. Factors that cause hypereffective heart. Sympathetic stimulation can increase the effectiveness of the heart via: (2) increasing the strength of heart contraction. Factors that can cause a hypoeffective heart: (1) coronary artery blockage.
Thursday, March 19, 2015 - 11:09. Ed Sheeran has added yet another amazing accolade to his collection with the news that his global smash hit sophomore album X has hit the 2 million sales mark, joining a select band of chosen superstars to hit the same achievement.
WHEREVER I MAY ROAM. Metallica -- often referred to as The Black Album because of its stark cover art -- sold another 3,000 copies in the week ending May 25. That brings its cumulative total to 16,002,000. SoundScan began tracking U.S. music sales in 1991.